I would say at your age and with two FIT tests that came back normal, cancer would be VERY unlikely.

I am 41, so nearly three times your age and over the summer, had some rectal bleeding, occasional loose stools (maybe once a week), some weight loss and some trapped wind. The specialist told me that at my age, the chance of cancer was very, very low, that colon cancer mostly affects older people. He said IBD was more likely, but was still not that likely in my case.

There are many things that can cause blood in your stool, from IBD to hemorrhoids or a little cut somewhere. You can find charts and stuff online giving the number of people with various symptoms who are diagnosed with colon cancer and for under 50s with rectal bleeding and abdominal pain, it is very low. I know the internet isn't the most reliable but still.